ESTUDO GEOOUÍMICO DOS SOLOS E FORMAÇÕES SUPERFICIAIS DO BRASIL. PARTE 1 Caracterização e repartição dos principais tipos de evolução pedogeoquímica

ADOLPHO JOSÉ MELFI, GEORGES PEDRO

Resumo


The pedologic classifications used in Brazil are mainly morphogenetic; hence they are not ¡rrecise indicators for the reconstruction of the nature of the processes involved during surface evolution of the mineral fraction of soils. The geochemical type ofsoil evolution in Brazil is charactèrized by the study of chrystallochemical essentially and physico-chemical aspects related to the clay fraction. Thus an essencially pedogeochemical interpretation is obtained. As a consequence the geographical distribution of the types is presented.


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